Electric heater



June 27, 1933.

KN m 44 v INSULATION J. R. MOYLE ELECTRIC HEATER Filed Oct. 14, 1929 2 Sheets-Sheet l INVENTOR.

\JBTTIES ATTORNEYS.

J. R. MOYLE ELECTRIC HEATER June 27, 1933.

Filed Oct. 14. 1929 2 Sheets-Sheet 2 III. 2-3:: I

INVENTOR. Jame 5 R.MU L 1E ATTORNEYS.

Patented June 27, 1933 UNITED. STATES JAMES R. MOYLE, OF SOUTH JACKSONVILLE, FLORIDA ELECTRIC HEATER Application filed October 14, 1929. Serial No. 399,667.

This invention relates to improvements in electric heaters.

The primary object of this inventionis the provision of an electric liquid heater, of a type wherein the electrical resistance unit is immersed directly in the liquid of a tank, in a relation for eflieient and economical heating of the liquid, and in such manner that the resistance unit may be readily accessible in event it is desired to inspect or repair parts thereof. I

A further object of this invention is the provision of an improved liquid heater embodying a novel type of electrical resistance unit placed in such relation to the parts of a liquid tank that a most efllcicnt heating of the liquid may be accomplished with a proper thermo-syphonic action of the latter.

Other objects and advantages of this in! vention will be apparent during the course of the following detailed description. In the accompanying drawings, forming a part of this specification, and wherein similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a sectional View taken on a vertical plane diametrically through the improved heater.

Figure 2 is a top plan view of the electrical resistance unit.

Figure'3 is a side elevation of the electrical resistance unit, showing its mounted parts.

Figure 4 is a vertical sectional view taken through the electrical'resistance unit, showing cooperating details of the same.

Figure 5 is a sectional view taken substantially on the line 5-6 of Figure 4.

Figure 6 is a fragmentary sectional view taken substantially on the line 66 of Figure 5.

In the drawings, wherein for the purpose of illustration is shown only a preferred embodiment of the invention, the letter may generally designate a liquid tank, having associated therewith a jacket or casing B wherein the improved electrical resistance unit C is mounted for efficient heating of the liquid.

Referring to the unit 0, the same includes a flat circular disc-shaped base 10, preferably of brass or some non-corrosive material,

which is adapted for attachment to the lower end of the casing B in a manner to be subsequently mentioned' This base 10, on the upper surface thereof, has a pair of insulation pieces or members 11 and 12' secured thereon. The members 11 and 12 are of the general shape shown in Figures 4, 5 and 6 of the drawings, each being provided with a vertical passageway 14, through which attaching bolts 15 and 16 respectively extend for the members 11 and 12, for attachment of the latter to the base 10. These bolts 15 and 16 have the upper ends 18 thereof screw threaded, for each receiving a pair of brass nuts 19; the lowermost of which clamps against a rubber or fiber disc or washer 20, on top of the respective insulation members 11 and 12, to seal off the passageway 14 from leakage of water therethrough. The pair of nuts 19 for each bolt stem enables the connection of the lower ends of the resistant coils 24 and 25 to the stems 15 and 16 respectively, as will' be subsequently brought out. The bolt stems 15 and 16 extend downwardly through suitable fiber insulation sleeves or bushings 27 in the suitable apertures through the base 10. A rubber washer 28'is interposed between the top of the base 10 and the insulation members 11 and 12, to prevent any leakage of water through the disc 10 from beneath the insulation members 11 and 12, as can readily be understood from'Figure 6. A fiber insulation disc 30 is placed below the metal base 10, having suitable openings thru which the screw threaded ends31 and 32 of the bolts 15 and 16 extend. Below the fiber insulation disc 30 the screw threaded ends 31 and 32 are each provided with a pair of relatively movable brass nuts 34 screw threaded thereon; the uppermost of which is adjustable against a metal washer 35 to additionally prevent leakage of water from the tank, and more particularly about the bolts 15 and 16, as can readily be understood. These pairs of nuts 34 are adapted to clamp therebetween, the ends of suitable conducting wires 37 for the pas-' sage of current thru the resistance coils 24 and 25, as can well be understood from Figure 1 of the drawings.

" The members 11 and 12, laterally of the bolt connection thereof upon the base 10, as above described, are respectively provided with vertically recessed sockets 40 and 41,

. 45 being. screw threaded at 46, and extending downwardly through reduced openings in the insulation members 11 and 12; through the washer 28, and being screw threaded into the base 10, as shown in Figure 4 of the drawings; the screw threaded connection of these ends 46 in the base 10 terminating in dead ends therein. Brass nuts 48 are adjusted in the lower ends of the sockets and 41, being screw threaded upon the ends 46 of the rods 45, to clamp the rods in position upon the base and axially of the sockets 40 and 41, to properly hold the insulated sleeves 42 and 43 vertically, as shown in Figure 4 of the drawings. The insulation sleeves 42 and 43 are, of course, for the purpose of supporting the resistance coils 24 and 25 respectively, and they are of appropriate length to serve that purpose. The upper ends of the insulation sleeves 42 and 43 are enlarged, at 50, in an upward tapered convergent relation, which are adapted to center within suitable passageways 51 and 52 respectively provided in an insulation connecting piece 54, which'is preferably formed of porcelain. The cross piece 54 receives the upper screw threaded ends 55 of the brass rods 45 thru the passageways thereof, and the extreme upper screw threaded ends 55 have brass nuts 56 thereon clamped against suitable brass washers 57, to cover the passageways 51 and 52, as shown in Figure 4. The adjustment of the nuts 56 effectively clamps the connector 54 upon the tops of the sleeves 42 and 43, and not only efl'ectively spaces and supports the upper ends of the sleeves 42 and 43, but the intermediate portion thereof betweenv the sleeves 42 and 43 provides a seat for a bolt 60, which depends into the space between the upper ends of the coils 24 and 2'5, there is provided with a pair of nuts 62 and 63, with a suitable conductive washer 64 therebetween.

The coils 24 and 25 are of low electrical resistance alloy; their lower ends being connected, as above mentioned, to the bolts or stems 15 and 16 respectively, between the clamping nuts 19 above described. The coils 24 and 25 spiral upwardly along and exteriorly about the insulation sleeves 42 and 43, and at their upper ends are conductively connected at opposite sides of the washer 64, and between the nuts 62 and 63, in a manner which *is apparent from Figure 4 of the drawings.

Of course, it will be understood by anyone skilled in this art that the current passes thru one of the coils, entering at a cable connection 37, and at the bolt 60 enters the other emme coil and passes therethrough and through the other cable 37, for the obvious purpose of igniting the resistance unit coils. It is to be noted that the cross bar 54 is of substantially rectangular shape, and is as compact as possible.

Referring to the jacket or casing B, the same comprises a cylindrical body 80, defining a chamber 81 therein, which is open at the lower end of said body 80; the latter there being provided with an annular outwardly extending attaching flange 82. The resistance unit C is adapted to he slipped into the chamber 81 from the lower open end, and the base 10 is bolted to the flange 82 as at 85, shown in Figure 1 of the drawings. Of course, a washer 86 seals the connection of the base 10 with the casing flange 82, and the electrical resistance unit extends upwardly into the chamber 81. The body 80 terminates in a top wall 89, with an upwardly extending internally screw threaded reduced nipple 90 into which the lower end of a hot water outlet conduit 91 is threaded.

As to the assemblage of the details so far described, to the tank A, the latter may be of any approved formation. Preferably it consists of a cylindrical body wall 92, having a top wall 93 and a bottom 94; the latter of which may be bowed upwardly. Centrallythe wall 94 has a welded or other leak-proof connection at 95 with the jacket body 80 intermediate the ends of the latter. Thus, a lower portion of the jacket body 80 extends below the bottom Wall of the tank A, so that the resistance unit connections at 85 are readily accessible, to permit a detachment of the electrical resistance unit C without the necessity of touching the construction of the tank A in any particular. Within the cham ber or compartment 95 of the tank A, the jacket or casing B is provided with water inlet openings 96, circumferentially thereabout in any approved number, as shown in Figure 1. These openings 96 are of course near the bottom 94 and permit the water to enter into the chamber 81 and pass upwardl along the resistance unit for being heate The hot water outlet conduit 91 above mentioned is continued upwardly, axially within the tank A and terminates at its to in an outlet which is spaced about one inc from the top wall 93 of the tank A, as shown in Figure 1. The tank A is furthermore provided with a cold water inlet conduit 97, which extends through the top wall 93 and downwardly along the wall 92, and terminates in an outlet 98 near the bottom wall 94, and of course within the compartment 95. The tank A furthermore has a hot water outlet connection 99 in the top wall 93 thereof, although this hot water connection may be otherwise than that shown.

Below the bottom 94 of the tank A, the jacket or casing B is provided with a sediment drain conduit 101, which may be suitabl valve controlled for draining sediment an other settlements from the bottom of the jacket or casing B, below the inlet openings 96.

The operation of the improved heating device will be apparent from the foregoing. The cold water is initially entering into the tank A through the conduit 97, outletting near the bottom 94. The cold Water of course passes through the opening 96, and along the upper portion of the resistance unitC, being sufiiciently heated, and due to thermosyphonic action the hot water passes upwardly thru the conduit 91 and exits in the top of the tank A, from whence it is withdrawn through the conduit 99 in a manner perfectly apparent. The insulation cross connection 54 offers very little obstruction to upward passage of water within the jacket or casin B as is readil a arent and as a l9 7 7 result a natural thermo-syphonic action of the liquid takes place.

Various changes in the shape, size, and arrangement of parts may be made to the form of invention herein shown and described, without departing from the spirit of the invention or the scope of the claims.

I claim:

1. In an electrical resistance unit the combination of a base, insulation members mounted upon the base, rods connected with the base and extending through said insulation members in substantial parallelism, insulation sleeves of elongated formation disposed on said rods, insulation means clamped on said rods at their ends opposite the base for holding said sleeves in position upon the rods, and electrical resistance coils spiralled about said insulation sleeves connected in circuit at similar ends thereof, and at the opposite ends having means for connection to conducting wires.

2. In an electrical resistance unit a base, porcelain socket members mounted on the base, conductors extending into said porcelain socket members from the side of the base opposite that on which said members are mounted, a pair of elongated insulation supports mounted in sockets of said socket members, means detachably spacing and connecting the ends of said insulation supports at their ends opposite the said members, and resistance coils on said insulation supports having their ends adjacent the base connected to said conductors and at their opposite ends connected together in a conducting relation.

3. In an electrical resistance unit the combination of a base, insulation members provided with sockets, rods carried by the base and extending thru said insulation members and sockets in substantial parallelism, means associated with said rods detachably securing said insulation members to said base, insulated sleeves of elongate formation disposed on said rods with the lower ends of said sleeves seated in said sockets and terminating short of the bottom of said insulation members, insulation means clamped to said rods at their ends opposite the base for holding said sleeves in position upon said rods, and electrical resistance coils spiralled about said insulation sleeves connected in circuit at similar ends thereof and at the opposite ends having means for connection to conducting wires.

4. In anelectrical resistance unit, the combination of a base; electrical insulation memberscarried on said base and provided with sockets, elongate sleeves of electrical insulation material extending from said sockets; means extending thru said sleeves, said members and into said base to retain said sleeves in parallelism and to retain said sleeves to said members; an electrical energy conducting and resistance means carried by said sleeves and members and spaced from said first mentioned means.

' JAMES R. MOYLE. 

